JP6601081B2 - Rolling bearing - Google Patents

Description

  The present invention relates to a rolling bearing in which a cage includes a pair of divided bodies.

  As a cage for holding rolling elements provided between an inner ring and an outer ring of a rolling bearing, a so-called one-sided type cage (crown-shaped cage) is known. This type of cage has an annular portion located on one axial side of the rolling element and a plurality of pillars extending from the annular portion to the other axial side, and is adjacent in the circumferential direction. A space between the matching pillars is a pocket for accommodating the rolling elements.

  When a rolling bearing equipped with such a single-holding type cage rotates at high speed, the column part (particularly the tip side) is elastically deformed by centrifugal force, and the radially inner part of the column part and the rolling element interfere with each other. As a result, the rotational torque of the rolling bearing may increase or the rolling bearing may be seized.

  On the other hand, there is also known a double-holding type cage that can suppress deformation of the column portion even under high-speed rotation conditions (see, for example, Patent Document 1). As shown in FIG. 7, the double-holding type retainer 90 has a pair of annular portions 96a and 96b and a plurality of column portions 99 connecting the annular portions 96a and 96b. A space between the pair of pillars 99 and 99 adjacent to each other in the circumferential direction between 96a and 96b is a pocket for holding the rolling elements.

  And this holder | retainer 90 is comprised by connecting a pair of division bodies 91a and 91b which are annular | circular shaped. The divided body 91a (91b) includes an annular part 96a (96b) and a connecting part 98a (98b) extending in the axial direction from the annular part 96a (96b), and the connecting parts 98a on both sides. , 98b are connected in a state where they are abutted in the axial direction, so that the column portion 99 is configured. And in order to make the division bodies 91a and 91b inseparable in the state which the connection parts 98a and 98b faced each other, as shown in FIG. 8, the connection part 98a of one division body 91a is this connection part 98a. It has the protrusion part 95a which protrudes from. And the connection part 98b of the other division body 91b has the recessed part 94b in which the said protrusion part 95a fits. The projecting portion 95a has a claw shape, and when the projecting portion 95a fits into the recessed portion 94b, the pair of divided bodies 91a and 91b are connected so as not to be separable in the axial direction. 90 is configured.

JP 2009-168110 A

  As shown in FIG. 8, the protruding portion 95a has a cantilever shape protruding from the abutting surface 97a of the connecting portion 98a and is elongated, so that the protruding portion 95a tends to be a weak point in terms of strength. In particular, when the rolling bearing rotates and the rolling element is advanced and delayed, a circumferential tensile force repeatedly acts on the retainer 90, and the protruding portion 95a may be a starting point and may be damaged. If the protrusion 95a is damaged, the divided bodies 91a and 91b are separated, and the rolling elements cannot be held.

  Then, an object of this invention is to improve the durability, when a holder | retainer has a pair of division body divided into two in the axial direction.

  The rolling bearing according to the present invention includes an inner ring, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, a pair of annular portions, and a plurality of column portions connecting the pair of annular portions. And a retainer that serves as a pocket for accommodating the rolling elements between the column portions adjacent in the circumferential direction between the annular portions, and the retainer is divided into two in the axial direction. Each of the divided bodies has a connecting portion that forms the pillar portion by being connected in a face-to-face state, and the connecting portion of one of the divided bodies includes the divided bodies. In order to prevent separation, the connecting portion of the other divided body has a recess into which the protruding portion fits, and the one divided body further includes: It has a convex part which enlarges the thickness in the base of the projection part.

  According to this rolling bearing, the cage has a pair of divided bodies that are divided into two in the axial direction, and these divided bodies are connected by the projecting portions and cannot be separated. And the intensity | strength of this protrusion part can be raised by the convex part which enlarges the thickness in the base part of a protrusion part, and it becomes possible to improve the durability of a holder | retainer.

Further, the protruding portion protrudes from a butting surface on which the connecting portions are butted together, and the convex portion is formed on the radially inner side surface of the divided body, and the radially inner side surface and the butted surface It is preferable that it is formed across an intersecting line intersecting with a virtual surface extending from the surface.
By this structure, it becomes the structure by which the convex part was provided in the part where stress becomes high, and the intensity | strength of a protrusion part can be raised effectively.

In addition, the rolling bearing is assembled by bringing the rolling elements closer to each other from both sides in the axial direction with the rolling elements interposed between the inner ring and the outer ring and connecting these divided bodies. In this case, it is preferable that the convex portion is formed on the radially inner side surface of the divided body, and the convex portion is located on the radially outer side than the outer peripheral surface of the inner ring.
With this configuration, it is possible to prevent the convex portion from interfering with the inner ring when the divided body is brought closer to the rolling element.

The convex portion is a radially inner side surface of the divided body and is formed within a range in the width direction of the raceway surface of the inner ring, and the radial interval between the convex portion and the raceway surface is the rolling distance. It is preferable that it is larger than the movement allowable dimension in the radial direction of the cage with respect to the moving body.
With this configuration, it is possible to prevent the convex portion from contacting the inner ring, particularly the raceway surface.

Alternatively, the protruding portion protrudes from an abutting surface where the connecting portions are butted together, and the convex portion is formed on the radially outer surface of the divided body, and the radially outer surface and the butted surface It is preferable that it is formed across an intersecting line intersecting with a virtual surface extending from the surface.
By this structure, it becomes the structure by which the convex part was provided in the part where stress becomes high, and the intensity | strength of a protrusion part can be raised effectively.

  In addition, the rolling bearing is assembled by bringing the rolling elements closer to each other from both sides in the axial direction and connecting these rolling elements with the rolling elements interposed between the inner ring and the outer ring. In this case, it is preferable that the convex portion is formed on the radially outer side surface of the divided body, and the convex portion is located on the radially inner side with respect to the inner peripheral surface of the outer ring. With this configuration, it is possible to prevent the convex portion from interfering with the outer ring when the divided body is brought closer to the rolling element.

  In addition, the convex portion is formed on the radially outer side surface of the divided body and within a range in the width direction of the raceway surface of the outer ring, and the radial interval between the convex portion and the raceway surface is the rolling distance. It is preferable that it is larger than the movement allowable dimension in the radial direction of the cage with respect to the moving body. With this configuration, it is possible to prevent the convex portion from contacting the outer ring, particularly the raceway surface.

  According to the rolling bearing of the present invention, the cage has a pair of divided bodies that are divided into two in the axial direction, and the divided bodies are connected by the protruding portions and cannot be separated. The strength of the cage can be increased, and the durability of the cage can be increased.

It is sectional drawing which shows one Embodiment of the rolling bearing of this invention. It is a perspective view of a holder | retainer. It is a perspective view which shows the state which was a part of holder | retainer and isolate | separated the division body. It is sectional drawing of the holder | retainer which shows the state which isolate | separated the division body. It is sectional drawing of the holder | retainer which shows the state which connected the division body. It is sectional drawing of the rolling bearing of another form. It is a perspective view of the conventional holder | retainer. It is a perspective view which shows a state which is a part of conventional cages and in which a divided body is separated.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing an embodiment of a rolling bearing according to the present invention. The rolling bearing 10 includes an inner ring 11, an outer ring 12, a plurality of rolling elements interposed between the inner ring 11 and the outer ring 12, and a cage 14 that holds these rolling elements. The rolling element of the present embodiment is a ball 13, and the rolling bearing 10 shown in FIG. 1 is a deep groove ball bearing.

  A raceway surface on which the balls 13 roll is formed on the outer peripheral side of the inner ring 11, and this raceway surface includes a raceway groove 21 having a concave arc shape in cross section. Shoulder portions 22 and 23 are formed on both axial sides of the raceway groove 21, and in this embodiment, the outer diameter of one shoulder portion 22 and the outer diameter of the other shoulder portion 23 are the same.

  A raceway surface on which the balls 13 roll is formed on the inner peripheral side of the outer ring 12, and this raceway surface is composed of a raceway groove 31 having a concave arc shape in cross section. Shoulder portions 32 and 33 are formed on both sides in the axial direction of the raceway groove 31. In this embodiment, the inner diameter of one shoulder portion 32 and the inner diameter of the other shoulder portion 33 are the same.

FIG. 2 is a perspective view of the cage 14. As shown in FIGS. 1 and 2, the retainer 14 includes a pair of annular portions 15 a and 15 b located on both sides in the axial direction of the ball 13, and a plurality of column portions 16 that connect the pair of annular portions 15 a and 15 b. And have. A pocket 17 for accommodating the ball 13 is formed between the pair of annular portions 15 a and 15 b and between the column portions 16 and 16 adjacent in the circumferential direction. The cage 14 is of a double-holding type that holds the ball 13 from both sides in the axial direction.
And the holder | retainer 14 has a pair of division body 40a, 40b divided into two by the axial direction, and it becomes the one holder | retainer 14 by connecting these division bodies 40a, 40b. Each of the divided bodies 40a and 40b is made of resin and is formed by injection molding.

  The first divided body 40a located on one axial side (the right side in FIG. 2) includes the annular portion 15a on the one axial side and a plurality of first portions extending from the annular portion 15a to the other axial side. And a connecting portion 41a. The second divided body 40b located on the other side in the axial direction (left side in FIG. 2) includes the annular portion 15b on the other side in the axial direction and a plurality of second portions extending from the annular portion 15b to the one side in the axial direction. And a connecting portion 41b. And these 1st connection parts 41a and the 2nd connection parts 41b are connected in the state where they were faced in the direction of an axis, and by these 1st connection parts 41a and the 2nd connection parts 41b, the above-mentioned of holder 14 A column portion 16 is configured.

  FIG. 3 is a perspective view showing a state in which the divided bodies 40a and 40b are separated from each other as a part of the cage 14. As shown in FIG. FIG. 4 is a cross-sectional view of the cage 14 showing a state in which the divided bodies 40a and 40b are separated. FIG. 5 is a cross-sectional view of the cage 14 showing a state in which the divided bodies 40a and 40b are connected. The 1st connection part 41a of the 1st division body 40a has the 1st protrusion part 43a which protrudes from the abutting surface 42a of this 1st connection part 41a. And the 2nd connection part 41b of the 2nd division body 40b has the 2nd recessed part 44b (refer FIG. 4, FIG. 5) in which the 1st protrusion part 43a fits.

  As shown in FIG. 5, the first projecting portion 43a is for making the divided bodies 40a and 40b inseparable from each other in a state where the connecting portions 41a and 41b are faced to each other. It has a claw shape, and the divided bodies 40a and 40b cannot be separated by engaging with the second recess 44b. The 2nd recessed part 44b of this embodiment consists of a groove | channel opened in the abutting surface 42b and the radial direction inner surface 45b of the 2nd connection part 41b.

  Moreover, in this embodiment, the 1st division body 40a and the 2nd division body 40b have the same shape (the same thing). Therefore, as shown in FIG. 3, the second divided body 40b also has a second protruding portion 43b protruding from the abutting surface 42b of the second connecting portion 41b, and the first connecting portion 41a of the first divided body 40a. Has a first recess 44a into which the second protrusion 43b fits.

  As described above, by causing the first divided body 40a and the second divided body 40b to approach each other in the axial direction, the protruding portion 43a (43b) is elastically deformed and passes through the concave portion 44b (44a), and the abutting surfaces 42a and 42b are brought together. The engaging claws 46a (46b) of the projecting portions 43a (43b) are hooked on the stepped surfaces 49b (49a) of the concave portions 44b (44a) in a state where the surface portions are in surface contact with each other, and the divided bodies 40a and 40b cannot be separated. Becomes a single cage 14. In addition, the connection structure by the said protrusion part 43a (43b) and the said recessed part 44b (44a) is provided in each of the some pillar part 16. As shown in FIG.

The protrusion 43a (43b) and the surrounding structure will be further described. In addition, since the 1st division body 40a and the 2nd division body 40b have the same shape as mentioned above, it is the same shape also about the 1st protrusion part 43a and the 2nd protrusion part 43b. Here, the first projecting portion 43a side of the first divided body 40a will be described as a representative.
As shown in FIGS. 3 and 4, the protruding portion 43 a protrudes in the axial direction from the abutting surface 42 a where the connecting portions 41 a and 41 b are abutted with each other, and has a cantilever shape. The protruding portion 43a has a linear main body portion 47a extending in the axial direction from the abutting surface 42a, and the engaging claw 46a protruding in the radial direction from the distal end side of the main body portion 47a.

  And the division body 40a of this embodiment has the projection part 50a which enlarges the thickness t (refer FIG. 4) in the base 53a of this projection part 43a while having the above-mentioned projection part 43a. ing. The protruding portion 43a is formed closer to the inner side in the radial direction, and the convex portion 50a is formed on the inner side surface 45a in the radial direction of the divided body 40a. The convex portion 50a is formed across an intersecting line L1 where the radially inner side surface 45a and a virtual surface K1 extending from the abutting surface 42a intersect in the axial direction. The convex portion 50a has a predetermined length in the axial direction, and has, for example, substantially the same length as the axial length of the protruding portion 43a. And the convex part 50a is provided so that the axial direction center part of the convex part 50a which has this predetermined length, and the said intersection line L1 may become the same position. Moreover, in this embodiment, the convex part 50b is formed in the same width as the protrusion part 43a. That is, the convex part 50b and the protrusion part 43a have the same circumferential dimension.

  As described above, in the first divided body 40a, the first protrusion 43a is reinforced by the convex portion 50a. Similarly, in the second divided body 40b, as shown in FIG. 2, the second projecting portion 43b is reinforced by the convex portion 50b. In addition, the division body 40a (40b) is resin, and the convex part 50a (50b) is a part integrally formed with the protrusion part 43a (43b).

  Thus, according to the rolling bearing 10 of the present embodiment, the retainer 14 has a pair of divided bodies 40a and 40b that are divided into two in the axial direction, and these divided bodies 40a and 40b are protruding portions 43a. It is the structure which is connected by (43b) and cannot be separated. And since the protrusion part 43a of the division body 40a of one side is a cantilever shape, there exists a tendency for a stress to become high in the base 53a, but the thickness t in the base 53a of the protrusion 43a is expanded. The strength of the protrusion 43a can be increased by the protrusion 50a.

In particular, as described above, since the convex portion 50a is formed across the intersection line L1 where the radial inner surface 45a of the divided body 40a and the virtual surface K1 extending the butted surface 42a intersect, the stress is high. Thus, the protrusion 50a is provided on the portion (the base 53a of the protrusion 43a), and the strength of the protrusion 43a can be effectively increased.
As described above, the stress generated in the base portion 53a of the protruding portion 43a can be relieved, and the strength of the protruding portion 43b of the other divided body 40b can be increased by the convex portion 50b to reduce the generated stress. Thus, the durability of the cage 14 can be improved.

Further, in the present embodiment, the convex portion 50a has a raised shape in which the cross-sectional shapes of the convex portion 50a and the protruding portion 43a do not change suddenly in a cross section when the convex portion 50a is viewed from the circumferential direction together with the protruding portion 43a (see FIG. 4). ing. That is, the convex part 50a has the inclined surface part 54a which protrudes gradually from the radial direction inner surface 45a of the division body 40a. And the convex part 50a shown in FIG. 4 has the top surface part 55a which connects the inclined surface parts 54a and 54a of both sides, and is parallel to the radial direction inner surface 45a.
The raised shape of the convex portion 50a may be other than the illustrated shape, or may be a convex arc shape. Even in the case of a convex arc shape, it can be said that the convex portion 50a has arc-shaped inclined surface portions 54a and 54a on both sides thereof.

  The assembly of the rolling bearing 10 (refer FIG. 1) provided with the above structure is demonstrated. The rolling bearing 10 is assembled in a state in which a plurality of balls 13 are interposed between the inner ring 11 and the outer ring 12, with the divided bodies 40a and 40b approaching the balls 13 from both sides in the axial direction. This is done by connecting 40a and 40b.

Therefore, the convex portion 50a formed on the radially inner side surface 45a of the first divided body 40a is located on the radially outer side than the outer peripheral surface 22a of the shoulder portion 22 of the inner ring 11. This makes it possible to prevent the convex portion 50 a from interfering with the shoulder portion 22 of the inner ring 11 when the divided body 40 a is brought closer to the ball 13.
The same applies to the convex portion 50b (see FIG. 2) on the second divided body 40b side, and the convex portion 50b is located on the radially outer side of the outer peripheral surface 23a of the shoulder portion 23 of the inner ring 11.

  Further, in the rolling bearing 10 assembled in this way, the convex portion 50a formed on the radially inner side surface 45a of the first divided body 40a is a range in the width direction (axial direction) of the raceway groove 21 of the inner ring 11. Is formed inside. That is, the axial dimension S of the convex part 50a is smaller than the axial dimension G of the raceway groove 21 (S <G), and the end 61 on one axial side of the convex part 50a is one of the axial directions of the raceway groove 21. The end 62a on the other side in the axial direction of the projection 50a is closer to the center in the axial direction than the end 21b on the other side in the axial direction of the raceway groove 21. Is located.

  In the rolling bearing 10 of the present embodiment, the cage 14 is a rolling element guide bearing that is guided by the ball 13, and a slight gap is provided between the pocket 17 of the cage 14 and the ball 13. Yes. The pocket 17 can contact the ball 13. For this reason, the retainer 14 is allowed to move with a predetermined dimension in the radial direction, and the retainer 14 is allowed to move with respect to the predetermined dimension in the axial direction. Even if the cage 14 moves (displaces) with respect to the allowable movement dimension, the cage 14 does not interfere with the inner ring 11 and the outer ring 12.

  Furthermore, the convex part 50a has the following structure. That is, the radial distance h1 between the convex portion 50a and the raceway groove 21 is larger than the allowable movement dimension C in the radial direction of the cage 14 with respect to the ball 13 (h1> C). The “movement allowable dimension” is a dimension from a state in which the cage 14 is neutral (neutral state). In the state in which the cage 14 is neutral, the pitch circle of the plurality of balls 13 is the cage 14. In this state, the pitch circles coincide with the pitch circles of the plurality of pockets 17. With this configuration, it is possible to prevent the convex portion 50 a from contacting the inner ring 11, particularly the raceway groove 21. If the convex part 50a contacts the raceway groove 21, the convex part 50a may scrape off the lubricating oil in the raceway groove 21, but this can be prevented according to the configuration of the present embodiment.

  In the present embodiment, the radial interval h1 between the convex portion 50a and the raceway groove 21 is greater than the radial interval B between the annular portion 15a (15b) of the retainer 14 and the shoulder portion 22 (23) of the inner ring 11. Is larger (h1> B), and the radial interval B is larger than the movement allowable dimension C in the radial direction of the cage 14 with respect to the ball 13 (B> C). That is, the relationship of h1> B> C is established. Thereby, the rolling element guide type rolling bearing 10 in which the cage 14 is stably guided by the balls 13 is obtained, and the convex portion 50a can be prevented from coming into contact with the inner ring 11 (the raceway groove 21). .

  In order to provide rolling element guidance, the axial dimension between the end portion 61 of the convex portion 50a and the end portion 21a of the raceway groove 21 on one side in the axial direction is the allowance for movement of the cage 14 in the axial direction. The axial dimension between the end 62 of the convex portion 50a and the end 21b of the raceway groove 21 on the other side in the axial direction is set to be larger than the capacity. It is set to be larger than the allowable amount.

  FIG. 6 is a cross-sectional view of another form of rolling bearing 10. The rolling bearing 10 shown in FIG. 6 has the same inner ring 11, outer ring 12, and rolling elements (balls 13) as the rolling bearing 10 shown in FIG. Specifically, the positions of the protrusions 43a and the recesses 44b for connecting the divided bodies 40a and 40b are different from the form shown in FIG. Others are the same.

  That is, the rolling bearing 10 shown in FIG. 6 will be described. The rolling bearing 10 includes an inner ring 11, an outer ring 12, a plurality of balls 13, and a cage 14. The retainer 14 includes a pair of annular portions 15a and 15b and a plurality of column portions 16 connecting the annular portions 15a and 15b, and between the annular portions 15a and 15b between the adjacent column portions 16 and 16 in the circumferential direction. It becomes a pocket 17 for accommodating the ball 13. The cage 14 has a pair of divided bodies 40a and 40b that are divided into two in the axial direction. Each of the divided bodies 40a and 40b has connecting portions 41a and 41b that constitute the column portion 16 by being connected in a face-to-face state. The connecting portion 41a of one first divided body 40a has a protruding portion 43a protruding from the connecting portion 41a so that the divided bodies 40a and 40b cannot be separated from each other. The connection part 41b has the recessed part 44b in which the protrusion part 43a fits. And the 1st division body 40a has the convex part 50a which enlarges the thickness in the base 53a of the protrusion part 43a further. Also in this embodiment, the first divided body 40a and the second divided body 40b have the same shape (the same).

  The above points are the same as the embodiment shown in FIG. 1, but in the embodiment shown in FIG. 6, the protruding portion 43 a protruding from the abutting surface 42 a where the connecting portions 41 a and 41 b are abutted with each other is formed on the abutting surface 42 a. The convex part 50a which reinforces this protrusion part 43a and is formed in the radial direction outer side is formed in the radial direction outer side surface 48a of the division body 40a, and this point differs from the form shown in FIG.

  And in the form shown in FIG. 6, the convex part 50a is formed ranging over the intersection line L2 where the radial direction outer side surface 48a of the division body 40a and the virtual surface K2 which extended the butt | matching surface 42a cross | intersect. By this structure, it becomes the structure by which the convex part 50a was provided in the part (base 53a of the protrusion part 43a) where stress becomes high, and the intensity | strength of the protrusion part 43a can be raised effectively.

Also in the form shown in FIG. 6, the rolling bearing 10 is assembled in a state in which the ball 13 is interposed between the inner ring 11 and the outer ring 12 with respect to the ball 13 from both sides in the axial direction. Is made close to each other and the divided bodies 40a and 40b are connected.
Therefore, the convex portion 50 a is located on the radially inner side with respect to the inner peripheral surface 32 a of the shoulder portion 32 of the outer ring 12. With this configuration, it is possible to prevent the convex portion 50 a from interfering with the shoulder portion 32 of the outer ring 12 when the divided body 40 a is brought closer to the ball 13.

  Further, the convex portion 50a is formed within a range in the width direction of the raceway groove 31 of the outer ring 12 (S <G). The radial interval h2 between the convex portion 50a and the raceway groove 31 is set to be larger than the movement allowable dimension C (from the neutral state) in the radial direction of the cage 14 with respect to the ball 13 (h2> C ). With this configuration, it is possible to prevent the convex portion 50 a from coming into contact with the outer ring 12, particularly the raceway groove 31.

  Furthermore, in the present embodiment, the radial interval h2 between the convex portion 50a and the raceway groove 31 is based on the radial interval A between the annular portion 15a (15b) of the retainer 14 and the shoulder portion 32 (33) of the outer ring 12. Is larger (h2> A), and the radial interval A is larger than the movement allowable dimension C (from the neutral state) in the radial direction of the cage 14 with respect to the balls 13 (A> C). That is, the relationship of h2> A> C is established. Thereby, the rolling element guide type rolling bearing 10 in which the cage 14 is stably guided by the balls 13 is obtained, and the convex portion 50a can be prevented from coming into contact with the outer ring 12 (track groove 31). .

The embodiments disclosed above are illustrative in all respects and not restrictive. That is, the rolling bearing of the present invention is not limited to the illustrated form, but may be of another form within the scope of the present invention.
In the above embodiment, the case where the rolling element is a ball has been described. However, the rolling element may be a roller, that is, the rolling bearing may be a roller bearing. Further, another type of rolling bearing in which the cage includes two divided bodies may be used.
Moreover, the protrusion part 43a for connecting the division bodies 40a and 40b of the retainer 14 may be other than the illustrated form, and the concave part 44b having a shape corresponding to the protrusion part 43a may be another type. Form may be sufficient.

DESCRIPTION OF SYMBOLS 10: Rolling bearing 11: Inner ring 12: Outer ring 13: Ball | bowl (rolling element) 14: Cage 15a, 15b: Ring part 16: Column part 17: Pocket 21: Track groove (track surface)
22a, 23a: outer peripheral surface 31: raceway groove (orbital surface) 32a, 33a: inner peripheral surface 40a: first divided body 40b: second divided body 41a: first connecting portion 41b: second connecting portion 42a: butting surface 43a : Projection 43b: Projection 44a: Concave 44b: Concave 45a: Radial inner surface 45b: Radial inner surface 48a: Radial outer surface 48b: Radial outer surface 50a, 50b: Protrusion 53a: Base t: Thickness K1: Virtual plane K2: Virtual plane L1: Intersection line L2: Intersection line h1: Radial dimension h2: Radial dimension C: Allowable dimension

Claims (6)

An inner ring, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, a pair of annular portions and a plurality of column portions connecting the pair of annular portions, between the annular portions And a cage that is a pocket for accommodating the rolling elements between the pillars adjacent in the circumferential direction,
The retainer has a pair of divided bodies that are divided into two in the axial direction,
Each of the divided bodies has a connecting portion that constitutes the pillar portion by being connected in a face-to-face state,
The connecting portion of one of the divided bodies has a protruding portion protruding from the connecting portion so that the divided bodies cannot be separated from each other, and the connecting portion of the other divided body is a recess into which the protruding portion fits. Have
The one of the divided bodies further includes a convex portion that enlarges the thickness of the base portion of the protruding portion ,
The protruding portion protrudes from a butting surface where the connecting portions are butted against each other,
The convex portion is formed on the radially inner side surface of the divided body, and is formed across a crossing line where the radially inner side surface and a virtual surface extending the abutting surface intersect each other. . Before Kitotsu portion is positioned radially outward from the outer peripheral surface of the inner ring, the rolling bearing according to claim 1. The convex portion is formed in a range in the width direction of the raceway surface of the pre-Symbol inner ring,
The rolling bearing according to claim 1 or 2 , wherein a radial interval between the convex portion and the raceway surface is larger than a movement allowable dimension in a radial direction of the cage with respect to the rolling element. An inner ring, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, a pair of annular portions and a plurality of column portions connecting the pair of annular portions, between the annular portions And a cage that is a pocket for accommodating the rolling elements between the pillars adjacent in the circumferential direction,
The retainer has a pair of divided bodies that are divided into two in the axial direction,
Each of the divided bodies has a connecting portion that constitutes the pillar portion by being connected in a face-to-face state,
The connecting portion of one of the divided bodies has a protruding portion protruding from the connecting portion so that the divided bodies cannot be separated from each other, and the connecting portion of the other divided body is a recess into which the protruding portion fits. Have
The one of the divided bodies further includes a convex portion that enlarges the thickness of the base portion of the protruding portion ,
The protruding portion protrudes from a butting surface where the connecting portions are butted against each other,
The convex portion is formed on a radially outer surface of the divided body, and is formed across a line of intersection where the radially outer surface and a virtual surface extending the abutting surface intersect. . Before Kitotsu portion is located radially inward of the inner circumferential surface of the outer ring, the rolling bearing according to claim 4. The convex portion is formed in a range in the width direction of the raceway surface before Kigairin,
The rolling bearing according to claim 4 or 5 , wherein a radial interval between the convex portion and the raceway surface is larger than a movement allowable dimension in a radial direction of the cage with respect to the rolling element.

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